Packing for stuffing-boxes.



' No Drawing.

UNITED STATES PATENT OFFICE.

ALFRED JAMES BAILEY, OF BRIXTON, LONDON, ENGLAND.

PACKING FOR STUFFING-BOXES.

To all whom it may concern:

Be it known that I, ALFRED JAMES BAILEY, residing at 42 Appach road,Brixton, London, En land, have invented certain new and usef ulImprovements in Packing for Stufling-Boxes; and I do hereby de clare thefollowing to be a full, clear, and

exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to compressible metallic packing compositions,and more especially to packing compositions in which a readily fusiblemetal, white metal for example, is mixed in a melted statewithpulverized talc or similar substance such as powdered graphite, toproduce a metal powder to which other suitable substances are added, forexample small quantities of asbestos fiber, flaky graphite and fat toproduce a plastic lubricant packing.

Such metallic packing compositions as heretofore composed possess littleor no resiliency and the object of the present invention is to increasethe efiiciency of the packing by imparting greater resiliency thereto,while leaving its durability and imperviousness unimpaired.

With the above object in View my invention consists in adding a smallquantityof powdered cork to the packing composition. By the termpowdered cork I mean cork reduced to a fineness approximating to that offlour. Y

I have found that a mixture in the following proportions by weight givesgood results:

White metal 28 lbs. Powdered talc 1 Powdered graphite 1% Powdered cork;Fat (engine tallow) 1% Carded asbestos 1 i In another composition theproportion of cork employed is two pounds, the propor- Specification ofLetters Patent.

Patented Nov. 2, 1915.

Application filed February 17, 1915. Serial No. 8,956.

tions of the other ingredients remaining the same as given in thepreceding example, but the proportions may of course be varied accordingto requirements, and the powdered tale is in some cases entirelyreplaced by powdered graphite.

In the manufacture of the packing the metal is melted and while'in themolten state the powdered talc, or powdered graphite or both thesesubstances are added and mixed thoroughly therewith so that on thecooling of the mixture a metallic powder is produced. The powdered corkand other ingredients are added to the metallic powder to form a plasticand resilient packing material. I

The natural mineral lubricant, such as talc or graphite, is used so thatthe metal may be pulverized. Other approved mineral lubricants may beused, but graphite is preferred. as it can be used for all purposes,whereas talc unfits the packing for use in connection with pumps. Otherkinds of fat besides tallow may be used. Other kinds of fibrous materialbesides asbestos may also be used, but carded asbestos is preferred. Thecork must be in the form of flour or powder, as when granulated cork isused charring takes place and the packing is spoiled.

What I claim is:

1. A packing composition, comprising a pulverized metal mixed with anatural mineral lubricant, fat, fibrous material, and

' powdered cork.

ture, in presence of two witnesses.

ALFRED JAMES BAILEY.

Witnesses:

ARTHUR F. ENNIS, H. D. JAMIsoN.

